I have an unusable / dead hard drive. It is under warranty. I must return the defective drive. I do not want to leave my data on it naturally. I have a HEAVY DUTY a.c. operated bulk tape eraser that will completely wipe clean any audio tape or any video tape. I am wondering if I apply it to the exterior of my defective hard drive if it will erase the data? PLEASE ONLY ANSWER this question if you are 95% or more SURE that your answer is correct. I have my own opinion, but it is not based on fact. I need to be sure on this as most people would also be.